What type of lens did Fresnel invent?
Convex lens
Concave lens
Fisheye lens
Fresnel lens
Answer
Fresnel invented the catadioptric Fresnel lens, which combines reflective and refractive properties. This lens design was used to extend the visibility of lighthouses, saving countless lives at sea.
Shedding Light on Augustin-Jean Fresnel: The Brilliant Mind Behind Modern Optics
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